Showing posts with label rc helicopter. Show all posts
Showing posts with label rc helicopter. Show all posts

Thursday, August 28, 2008

Electric RC helicopters


In recent years, electric rc helicopters have seriously fallen in price, become widely available and have become much easier to fly through greater stability, making them the ultimate "must have" control model radio.

As a result, they now constitute the fastest growing sector of the radio control hobbies flight, and models displayed on this page are fairly typical examples helicopters that were responsible for this huge explosion.
One type of electric rc helicopter which was so popular with newcomers is the fixed-pitch (FP) 4 channel model, as the Walkera Dragonfly 4, shown below. There are several of these helicopters available from different manufacturers, all based on the same basic design (the Venom Night Ranger and EF Sabre, for example).

Sold ready to fly (RTF), the PC 4 channels electric rc helicopters are ideal for beginners. They are still a challenge to begin with, but are a good, affordable introduction to multi-channel model helicopter flight.
Also, spare parts for this type of helicopter are widely available and cheap. Indeed, much of the helicopter learning curve is the purchase of spare parts, after those who are not less good landings!

The Walkera Dragonfly 4 has been and continues to be a very popular seller. I myself one, and you can read about this in more detail if these pages.

Monday, August 25, 2008

talk about mini rc helicopters

The blade pitch is fixed and you move up and down or left and right by speeding up or slowing down the main and tail rotors. Most mini rc helicopters take about 10 - 20 minutes to charge and can buzz around for about 5-7 minutes depending on the model.


Unlike a traditional R/C helicopter, micro or min rc helicopters are setup to always move forward. You control the hover height and right or left turns. By adding tiny weights to the nose of the copter before takeoff you can adjust how quickly the copter moves forward.


They're powered by a small brushed motor / pinion combination which turns a main gear that's attached to the main rotors. The secret behind their stability in the air is the weighted flybar. The flybar is attached to the main rotors and functions similarly to a gyroscope.


The gyroscopic action has a tendency to maintain it's axis of rotation relative to the ground and when no cyclic input is provided, it will keep the rc helicopter level.


There are no gyro's in mini rc helicopters like in conventional rc helicopters. Instead they have a trim switch which controls the speed of the tail rotor. Once you find the balance to counteract the rotational force of the main rotors, the tail will pretty much remain steady.




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Electric power system

One of the most popular RC heli manufactures in the world is the Align .The features:


Electric power system.


Simple and light weight design provides awesome flight performance and extreme <a href="http://www.3d.com">3D</a> capability.


Rigid fiberglass frame design.


Beautiful factory painted fiberglass canopy.


Rotor head/tail with thrust bearings.


Direct-to-swash CCPM linkage.


Center of gravity of Battery tray designed close to the rotor head.


Tail rotor drive belt system.


Fully driven tail auto rotation system.


Tail servo boom mount.


Specifications:


Length: 850mm


Height: 310mm


Main Blade Length: 425mm


Main Rotor Diameter: 970mm


Tail Rotor Diameter: 200mm


Motor Drive Gear: 12T/13T


Main Drive Gear: 162T


Autorotation Tail Drive Gear: 145T


Tail Drive Gear: 31T


Drive Gear Ratio: 1:13.5:4.68 / 1:12.46:4.68


Weight(w/o power system): 955g


Flying Weight: Approx 1700g